Marchesinia. i franz stephani. species hepaticarum (Vol. V, 1912). 



25. MarcHesinia sikkimensis St. n. sp. 



Sterilis, flavo-rufescens vel dilute brunnea, flaccida, dense depresso 

 csespitans, corticola. Caulis ad 6 cm. longus, irregulariter bipinnatus; 

 ramis primariis ad 3 cm. longis, reraote breviterque pinnulatis. Folia 

 caulina parum imbricata, oblique patula, in situ falcata, apice arcte 

 decurva, in plano latissime triangulata (1,7 mm. longa et lata) asymme- 

 trica, lata basi inserta, basi antica truncato-rotundata, apice rotundata. 

 Cellulx superae 18x36 [x, basales 27X54 [itrigonis ubique majusculis. 

 Lobulus maximus folio duplo brevior, in situ oblique adscendens, carina 

 leviter arcuata, apice quam basis duplo angustiore truncato, angulo 

 acuto, in plano ovato-rectangulatus, apice quam basis parum angustiore, 

 recte truncato, carina leviter arcuata, margine supero stricto nudo. 

 Amphigastria caulina maxima, caule 7 plo latiora, reniformia vel sub- 

 rotunda, sinuatim inserta, apice arcte recurva. 



Hab. Sikkim-Himalaya. 



Europa 



26. Marchesinia Mackayi (Hook.) Gray, Nat. Arr. Britt. PI. 

 1821, p. 689. 



Syn. : Jungermannia Mackayi Hook. Brit. Jung. tab. 53. 



Phragmicoma Mackayi Dum. Com. Bot. 1822, p. 112. 

 Homalolejeunea Mackayi S. Hep. Am. And., p. 134. 



Autoica vel monoica, magna, dilute brunnea vel olivacea, flaccida, 

 dense depresso-csespitans. Caulis ad 8 cm. longus, irregulariter multi- 

 ramosus, subfasciculatus. Folia caulina imbricata, concava apiceque 

 decurva, in plano late obovata (1,17 mm. longa, 1 mm. lata) apice late 

 rotundata, brevisssima basi inserta, basi antica longe truncata. Cellula; 

 superae 27 jt trigonis subnullis, basales 27 X 36 {j, trigonis parvis. Lobulus 

 minor, folio quadruplo brevior, subrecte patens, parum concavus, sub- 

 rectangulatus, parum longior quam latus, apice leviter emarginatus, 

 angulo acuto, altero dente subapicali simillimo approximato. Amphi- 

 gastria caulina majuscula, caule triplo latiora, subrotunda, transverse 

 inserta. Perianthia ex angusta basi subrotunda, valde compressa, 

 rostro parvo. Folia floralia perianthio subduplo breviora, obovato- 

 oblonga, obtusa; lobulo parum breviore, duplo angustiore, oblongo 

 ad ^/3 soluto, obtuso. Amphigastrium florale lobulis aequilongum, 

 anguste obovatum, apice rotundatum. Andrxcia in ramis mediana, 



155 



